Multiple jet spray nozzle



May L 3511 w. E. HENSEL 2,551,538

MULTIPLE JET SPRAY NOZZLE Filed Jan. 8, 1948 INVENTOR.

VVQH'e-r E Hensef HMM! MTM Patented May 1, 1951 iJNl'IED STATES .PATENTOFFICE MULTIPLE JET SPRAY NOZZLE Walter E. Hensel, South Berwick, MaineApplication January 8, 1948, Serial No. 1,176

1 Claim. l

This invention relates to a multiple jet spraying apparatus designed todeliver a plurality of jets of liquid in spray form.

The apparatus is adapted for a wide variety of uses among which may bementioned that of applying emulsion, oils, or other conditioning liquidin spray form to fibrous material such as wool, cotton, jute, hemp,etc., during the processing of such material. v

It is a commonpractice to condition fibrous material such as abovereferred to by spraying it with a conditioning liquid While it is beingcarried forward on a traveling apron and the apparatus herein describedis admirably suited for this purpose.

It is an object of the invention to provide a multiple jet sprayingapparatus which is simple in its construction and is inexpensive tomanufacture, and which will produce a plurality of sprays each of whichdelivers the conditioning liquid in atomized form uniformly over arelatively large area.

In order to give an understanding of the invention, I have illustratedin the drawings a selected embodiment thereof which will now bedescribed after which the novel features will be pointed out in theappended claim.

In the drawings,

Fig. 1 is a fragmentary sectional view of a spraying apparatus embodyingthe invention.

Fig. 2 is a fragmentary under side view.

Fig. 3 is a vertical section through Fig. 1.

Fig. 4 is a cross sectional view showing a different form of nozzle fromthat illustrated in Figs. 1 to 3.

The improved spraying apparatus comprises a liquid-containing chamber I,herein shown in the form of a tube, which is connected to any suitablesource of liquid supply from which liquid may be delivered to the tubel. Said tube I has a smooth exterior surface and is provided along itsbottom with a plurality of cylindrical openings 4.

Situated entirely Within the tube l, which will for convenience bereferred to as the outer tube, is an inner tube 2 which is connected toa suitable source of gaseous fluid under pressure such, for instance, asair or steam.

The inner tube 2 is provided with a plurality of nozzles, one for eachopening 4 in the outer tube, and each nozzle 3 extends axially throughthe corresponding opening l of the outer tube and projects slightlybeyond the outer smooth surface of said outer tube and has a deliveryopening of uniform diameter as clearly shown in Figs. 1, 3

and 4. The portion of each nozzle 3 that occupies its opening fl iscylindrical externally and has an exterior diameter somewhat less thanthe diameter of the opening 4 and as each nozzle 3 projects entirelythrough its opening li, the space between the exterior of each nozzle 3and the wall of the opening 4 constitutes an annular port havingparallel inner and outer walls through which the liquid in the outertube l may be discharged. Such liquid will, therefore, be delivered fromthe outer tube l in the form of a tubular stream surrounding the nozzle3.

Since the inner tube 2 is filled with gaseous fluid under pressure, ajet of such compressed fluid, whether it be air or steam or any othergaseous fluid, will issue from each nozzle 3, and as soon as the streamof gaseous fluid emerges from the end of the nozzle, it will naturallyexpand laterally.

As the tubular stream of liquid moves over the exterior of the nozzle 3and reaches the end of the nozzle, the expanding action of the jet ofgaseous fluid which is being delivered from the nozzle into the interiorof the tubular stream of liquid expands said tubular liquid streamradially and breaks it up into a fine spray which is deu liveredradially and over a relatively Wide area.

It is to be noted that the action of the compressed air or steam orother gaseous uid under pressure does not act on the liquid until aftersuch liquid has been discharged from the liquidcontaining chamber l,because of the fact that each nozzle 3 extends entirely through itsopening 4 and projects a distance beyond the outer face of the tube l.

The delivering of the jet of compressed air or steam into the interiorof a tubular stream of liquid which is uncomined exteriorly, (which isthe condition of the tubular stream after it leaves the opening l andwhile it is owing over and olf from the projecting end of the nozzle 3)operates through the radially expanding action of said jet of compressedair to atomize the tubular stream of liquid most effectively and todeliver the spray thus formed uniformly over a wide area.

The nozzles 3 are preferably removably mounted in the inner tube 2, eachnozzle being screwed into a boss with which the tube 2A is provided.Because these nozzles are thus removable, it is possible to change thenozzles if desired and substitute nozzles having a smaller or largercentral opening or port depending somewhat on the character of the spraywhich it is desired to produce.

In Fig. 4 a nozzle 3a is shown which has a much smaller port than thenozzles shown in Figs. 1 and 3.

It would alsoI be possible to employ nozzles having different exteriordiameters thereby to vary the size of the annular opening through whichthe liquid is discharged.

An important feature of the invention is that of having the nozzles 3extend clear through the openings 4 in the liquid-containing chamber andextend slightly beyond the exterior face of the liquid-containingchamber so that the tubular stream of liquid is not aiected by theexpanding action of the compressed air or steam until after such tubularstream has moved out of the opening 4 and is, therefore, unconnnedexteriorly.

The character of the spray may be varied by varying the pressure of theair, steam, or other gaseous fluid in the inner tube 2 and consequentlythe pressure of such gaseous fluid as it issues from the nozzle.

The liquid in the liquid-containing chamber l may be allowed toflowthrough the openings 4 by gravity, as would be the case if saidchamber were only partially lled with liquid as indicated in Fig'. 1, orthe chamber I may be lled with liquid under more or less pressure.

Moreover, since the jets of air, steam, or other gaseous fluid issuingfrom the nozzles do not act on the tubular streams of liquid until afterthe latter have been entirely discharged from the liquid-containingchamber, said jets Will have little or no effect on the rate ofdischarge of the liquid through the ports I regardless of the pressureof the gaseous fluid in the inner tube 2.

IV claim:

A multiple spray apparatus comprising an outer liquid-containing chamberpresenting a smooth under side in which is formed a plurality ofCylindrical openings, an inner tube containing fluid in gaseous formunder pressure located entirely within the liquid-containing chamber,and a plurality of nozzles carried by the inner tube, one for eachopening in the liquid-containing chamber, each nozzle having a deliveryopening of uniform diameter and extending entirely through its openingaxially thereof and projecting slightly beyond the outer smooth face ofthe liquid-containing chamber, the portion of each nozzle occupying anopening being cylindrical and having an exterior diameter smaller thanthe diameter of the opening it occupies, thereby providing between eachnozzle and the wall of its opening an annular space having parallelinside and outside Walls which constitutes an annular port of uniformarea through which the liquid from the liquid-containing chamber flowsin a gravity-propelled tubular stream which encloses the nozzle, theexpanding action of the jet of compressed gaseous fluid issuing from theprojecting e'nd of each nozzle into the interior of the correspondinggravity-propelled tubular stream acting thereon after it leaves theliquid-contain ing chamber to expand it radially and convert it into aspray covering a wide area.

WALTER E. HENSEL.

REFERENCES CITED `The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 325,376 Baker Sept. 1, 1885980,002 Price Dec. 27, 1910 1,017,533 Goodlett Feb. 13, 1912 1,047,619Decker Dec. 17, 1912 1,239,075 Bagnall et al. Sept. 4, 1917 2,178,539Hill et a1. NOV. 7, 1939

